I have a '70s semi & for reasons I can't begin to fathom, the soil pipe runs inside the house. It descends into the lounge & is simply boxed in. This provides an ideal sounding board to present anyone sitting in the lounge with a blow by blow account of everything that's occurring in the toilet! :oops:

I'm guessing that having the soil pipe moved outside would be a fairly major job, so was wondering if insulating the space in the box would help? I was thinking of maybe opening the boxing upstairs & filling the gap with polystyrene chips or similar. Obviously this would be a right pain if the boxing downstairs ever need opening.

I'd be grateful for any suggestions of how best to deal with this problem.

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